Thread-guide for spooling-machines.



PATENTED JULY 5, 1904.

J. R. MITCHELL.

THREAD GUIDE FOR SPOOLING MACHINES.

APPLICATION FILED APR. 1904.

N0 MODEL.

UNITED STATES Patented July 5, 1904.

PATENT EEicE.

JOHN R. MITCHELL, OF NEW' YORK, N. Y., ASSIGNOR TO MITCHELL- BISSELL COMPANY, OF NEl/V YORK, N. Y., A CORPORATION OF NEW JERSEY.

THREAD-GUIDE FOR SPOOLlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 763,995, dated July 5, 1904.

Application filed A ril 5, 1904. Serial No. 201,782. (No model.)

To all whom, it may concern:

Be it known that I, J OHN R. MITCHELL, a citizen of the United States, residing at New York, county of New York, and State of New York, haveinvented certain new and useful Improvements in Thread-Guides for Spooling- Machines, of which the following is a specification.

The object of the present invention is to produce a thread-guide for spoofing-machines which is readily adjustable and which will remain in position after adjustment.

A further object is to improve the guide so that it will more accurately deliver the thread to the spool.

The invention will be fully described in the following specification, reference being had to the accompanying drawings, in which Figure 1 is a perspective View of two of the guides and their holding devices. Fig. 2 is a plan View of one of the guides. Fig. 3 is a side view partly in section. Fig. 4: is a section on the line a 4: of Fig. 8, and Fig. 5 is a section on the line 5 5 of Fig. 4.

Referring to the drawings, a indicates a rail or bar on which the thread-guidesare mounted.

7) Z) indicate the guides, and c 0 indicate the springs which hold the guides upon the rail (6.

The guide-blocks b are formed of porcelain, glass, or other suitable hard material. Each guide-block is provided with a transverse guide-groove which is substantially V-shaped in plan, being wide at its receiving end 1 and converging to a narrow throat 2 at its delivery end. The delivery part of the guidegroove is at the extreme end of said groove at the rear side of the block b, and it is thus located as near as possible to the spool upon which the thread or yarn is to be wound. This is an improvement over former blocks of this character in which the throat or narrowest part of the guidegroove has been placed in the middle of a block or at some distance from the edge thereof. Guide-grooves so constructed do not lay the thread so accurately upon the spool as a guide having its i throat at the edge of the guide-block close to the spool, such as described herein.

A further improvement consists in making the bottom of the guide-groove flat or level transversely, particularly at its receiving end, so that the thread or yarn will wear equally upon all parts of it. By thus distributing the Wear the life of the guide-block is greatly prolonged. Heretofore the bottoms of such guide-grooves have been dished or troughshaped, thus confining the thread within narrow limits and hastening the wear and destruction of the block.

Guide-blocks of the class to which this invention relates usually rest upon a rail and are adjustable thereon to some extent to aline the guide-gooves correctly with the spools or cop -tubes upon which the thread is to be wound. Suitable means are provided for holding the guide-blocks from lateral movement on the rail while permitting longitudinal adjustment. As shown in the accompanying drawings, the rail a is provided with a longitudinal groove 3, and the guide-blocks are provided with tongues 4, which fit in said groove. The complementary parts of the rail and guide-blocks may be differently constructed, the object being to hold the blocks from lateral shifting While permitting longitudinal adjustment.

The guide-blocks are provided at each end with slots 5 to receive the ends of the spring clips or clamps c. The bottoms 6 of the slots 5 are inclined, as shown in Fig. 3, being lower at their outer ends than at their inner ends. Heretofore the slots in guide-blocks which receive the clamping-springs have been of uniform depth or provided with horizontal bottom surfaces, and it has been'impossible to hold them securely against longitudinal shifting. In other words, guide-blocks so constructed are liable to shift longitudinally on the rail after being adjusted. I have found that by making the bottoms of the slots inclined, as shown in Fig. 3, the guide-block will be securely held from shifting longitudinally by means of the spring-clamps. In such case the block is not held solely by friction; but the clamp takes a more or less positive hold upon it. It will be evident that the block cannot shift in either direction without raising one of the spring-clamps, in addition to overcoming the friction of both clamps upon the surfaces of the block and the friction of the block upon the rail. It is possible, however, to adjust the block on the rail without difiiculty either by lifting the spring-clamp against which the adjustment is to be made or by applying sufiicient force to overcome the various resistances.

The spring-clamps are usually made of suitable wire and fastened by screws 7 or otherwise to the rail. The particular configura: tion of the clamps c is not material to the present invention, provided they have springarms 8, adapted to enter and cooperate with grooves 5 in the block 6.

Having thus described my invention, what I desire to secure by Letters Patent is 1. A thread-guide comprising a block having a guide-groove extending from side to side thereof, the said groove being substantially V-shaped in plan and having its narrowest portion located at one side of the block.

2. In combination, a rail and a series of thread-guides adjustably mounted thereon, each of said guides having a transverse groove substantially \I-shaped in plan, the delivery portion of said groove being narrowest and located at one side of the block.

3. The combination with a rail, of a guideblock mounted thereon, and spring-clamps for holding the block on the rail, the said block having grooves with oppositely-inclined or sloping bottom surfaces upon which the ends of the spring-clamps rest, for the purpose set forth.

4. A guide-block for spoofing-machines having a transverse groove for guiding the thread, and a pair of grooves to receive holding-clamps, the latter grooves having oppositely-inclined bottom surfaces, for the purpose set forth.

5. A glass or porcelain guide block for spoolinganachines having a transverse tapering groove for guiding the thread, the narrowest part of said groove being at one side of the block, and having a pair of grooves with oppositely-inclined bottom surfaces for receiving holding-clamps, for the purpose set forth.

6. A threadguide for spoofing-machines having a transverse groove substantially V- shaped in plan, the narrowest portion of said groove being located at one side of the block and the bottom of the groove at the other side of the block being flat transversely of the groove.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN R. MITCHELL Witnesses:

ALEXANDER S. STEUART, JAMns A. WATsoN. 

